ENVS 010 Lecture Notes - Lecture 1: Data Set, Overfishing

• School: SJSU
• Department: Environmental Studies, Department of
• Course: ENVS 010
• Professor: Rachel Lazzeri-Aerts

Document Summary

Evolve several mechanism, layer of fat: double layer of fur. Dense, waterproof, layer of air gives it a glossy look. Die = air come out of the fur. Body turn over food and energy to keep them warm. Eat about 30% body weight to turn it over and keep them warm. Can no longer hunt, grow back half after almost extinction. Some of population in alaska, declining 1990-1996 in the aleutian islands crash. Not natural, radio transmitter, 3 years of data. Killer whale lives on the same habitat. No obvious interaction between 2 species until 1991, killer whale eating a sea otther. 9 more attacks observe many more years. Killer whale attack sea otters, but not enough to conclude. Want to compare trends, looking at adapt island (small island w/ 2 different coastlines) Clam lagoon is small and kw cant get in. 1 exposed to kw while one is not exposed to kw (killer whale)